Ch 5, 4 Homeostatic Imbalances of skin: skin Cancer Flashcards Preview

A&P > Ch 5, 4 Homeostatic Imbalances of skin: skin Cancer > Flashcards

Flashcards in Ch 5, 4 Homeostatic Imbalances of skin: skin Cancer Deck (5)
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1
Q

skin cancer

A

most skin tumors are benign (do not metastasize)
risk factors
-overexposure to UV radiation
-frequent irritation of skin
some skin lotions contain enzymes in liposomes that can fix damaged DNA

2
Q

Basal call carcinoma

A

least malignant, most common
stratum basale cells proliferate and slowly invade dermis and hypodermis
cured by surgical excision in 99% of cases

3
Q

squamous cell carcinoma

A

second most common
involves keratinocytes of stratum spinosum
most common on scalp, ears, lower lip and hands
good prognosis if treated by radiation therapy or removed surgically

4
Q

melanoma

A

most dangerous
involves melanocytes
highly metastatic and resistant to chemo
treated by wide surgical excision accompanied by immunotherapy

5
Q

melanoma characteristics (ABCD rule)

A

asymmetry, the 2 sides of the pigmented area do not match
border exhibits indentations
color is black, brown, tan and sometimes red or blue
diameter is larger than 6 mm (size of a pencil erasor)